NAME
        LengthArgstring - Returns the length value stored in the argstring

    SYNOPSIS
        length = LengthArgstring(argstring)
        D0                       A0

        ULONG LengthArgstring(UBYTE *);

    FUNCTION
        This function returns the length value stored in the argstring.
        This is *NOT* the same as doing a strlen() type call on the
        argstring.  (Note that argstrings may contain NULLs)

    INPUTS
        argstring - A pointer to an argstring that was created by ARexx

    RESULTS
        length - The length of the argstring.

    EXAMPLE

    SEE ALSO
        createargstring()

    BUGS